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Who experimentally proved that all cells come from pre-existing cells (theory of Virchow)?
a) Mathias Schleiden 
b) Louis Pasteur
c) Theoder Schwann  
d) Evangelista Purkinje

b

Explanation of Cell theory:


Which of the following is/are Sub-cellular particles?
a) Viruses                                             
b) Prions
c) Viroids                                              
d) all of these


d

The living organism like characters of virus is/are….. 
a) transmit their character to next generation
b) possesses DNA or RNA and protein
c) they reproduce                                
d) all of these


d

The non livelong characters of virus is/are…
a) they are not composed of cell     
b) they can be crystallized
c) they are inactive outside living cell
d) all of these

d

Viroids are made up of……
a) protein                                              
b) DNA 
c) RNA                                  
d) all of these


c